Space-block for armatures.



No. 663,075. Patentad Dec. 4, I900.

H GEISENHUNER SPACE BLOCK FOR ABMATURES.

(Appliclfion filed July 28, 1900.

(No Iudal.)

rr O hm mh n We 35 W. C UJ- WI n e H Witnesses UNITED STATES PATENT O FIcE.

HENRY GElSENHflNER, OF SCHENECTADY, NEIV YORK, ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF NEYV YORK.

SPACE-BLOCK FoR ARMATURES.

SPECIFICATION forming part of Letters Patent No. 663,07 5, dated December 4, 1900.

Application filed July 28, 1900. derial No. 25,074. (No model.)

1'0 aZl whom it may concern.-

Be it known that I, HENRY GEISENHGNER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Space-Blocks for Armatures, (Case No. 1,503,) of which the following is a specification.

This invention relates to means-for promot- :0 ing ventilation of armatures of dynamo-elem tric machines, electric motors, or other electric apparatus employinga laminated core in which it is desirable to promote ventilation to keep down excessive heating. Devices of this kind are commonly called space-blocks from the fact that they were formerly constructed of castings in the form of blocks adapted to be affiXed to the core-plate of an armature. In a prior patent issued to me I described one form of such device in which iron strips were secured edge on to a lamina or core-plate of an armature by means integral with the core-plate, a number of such devices being placed at intervals in the length of the armature, so as to separate adjacent bundles of laminae by an airspace through which the air might circulate. My present invention relates to a similar construction in so far as the means of fastening the spacing strips or pieces to the core-plate are concerned, but differs specifically in the manner of attaching them to the core-plate. I form the core-plate of sheet-iron provided with a number of radial loops or eyes upset from the body of the plate, into which are inserted spacingstrips which are locked in position by suitable fastening devicesas, for example, by arranging the strips in position and constructing the top surface of the eyes so as to bind the strips in place or by giving the strips a bend, so as to prevent their radial displacement under centrifugal thrusts when the armature or core is in motion.

The features of novelty will be more particularly pointed out hereinafter and will be definitely indicated in the claims appended to this specification.

In the accompanying drawings, which illustrate my invention, Figure 1 is a side elevation of a portion of a core-plate embodying my improvements. Fig. 2 is a sectional view 1 of a portion of such core-plate, and Fig. 3 is a view illustrating one plan of assembling the core-plates.

1- represents a section of a punching of sheet-iron of circular shape, such as is commouly employed in the construction of armatu res. During the operation of punching the plate or as a subsequent step, if preferred, I strike up from the face of the plate hollow 6o ridges or protuberances, as indicated at 2 2*, one set of these being preferably formed on the teeth of the plate and the other set at a point close to the center, the pairs 2 2 being in radial alinement. 'lhrough the eyes thus formed I insert metal strips 3, preferably of iron, which may be anchored firmly by making the lit suliiciently tight or by flattening the eye after the strip is in position, orI may bend the strip after insertion, as indicated in the two strips at the left side of Fig. 1. These strips may be round, square, or rectangular.

As indicated in Fig. 2 they are formed of rectangular strips of sheet metal and in Fig.

3 as round in cross-section. Either plan prevents the shifting of position of the strip under centrifugal thrust.

In assembling the armature-plates the pressure to which they are subjected will further bind the strips in position. A single coreplate or two such coreplates may be employed to form the air-space. In Fig. 3 I have shown two placed face to face to form a ventilatingspace of double thickness.

An organization of the kind herein described is very cheap to construct and securely anchors the parts in place and is not easily warped or twisted out of true alinement by the pressure to which the core is subjected before the armature is finally completed.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. A. ventilating-plate for an electric machine, provided With spacing-strips inserted in sockets struck up from the face of the plate 95 through which the space-strips extend.

2. A space-plate for an armature, formed of sheet metal having radial sockets struck up from its face, and provided with spacestrips pushed through said sockets and an- Ioo chored in place.

3. A. space-plate for an armature, having tubular sockets struck up from its face, spaceprovided at in tervztlq in its length with corestrips adapted to be pushed through said plates having space-strips secured thereto, sockeis, and means for locking the spacetwo such core-plates beingpleced face to face strips in place. to provide a sufficient ventilztting-s mce. 5 4. A space-plate for an armature, having a In witness whereof I have hereunto set my 15 hand this 26th day of July, 1900.

plurality of redial sockets struck up from its H HENRY GETSENHONER.

face, and space-strips within said sockets bent out of alinement after insertion to prevent iVirnesses:

displacement under radial thrusts. BENJAMIN B. H ULL, :10 5. Au armature for an electric machine JAMES J. HIGGINS. 

